{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{2}{c}{PID: Republican}        &\multicolumn{2}{c}{Trump over Biden}       \\
                    &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         \\
                    &        none         &           B         &           C         &           D         \\
                    &        none         &        none         &        none         &        none         \\
\hline
Employer SBO        &       0.177\sym{***}&       0.102\sym{**} &       0.147\sym{***}&       0.125\sym{**} \\
                    &     (0.029)         &     (0.033)         &     (0.039)         &     (0.043)         \\
[1em]
Non-Employer SBO    &      -0.000         &      -0.007         &       0.028         &       0.047         \\
                    &     (0.019)         &     (0.020)         &     (0.025)         &     (0.026)         \\
[1em]
Constant            &       0.473\sym{***}&       0.484\sym{***}&       0.476\sym{***}&       0.475\sym{***}\\
                    &     (0.009)         &     (0.009)         &     (0.011)         &     (0.012)         \\
\hline
Controls            &                     &                     &                     &                     \\
Observations        &        2284         &        2283         &        2280         &        2279         \\
R-squared           &        0.03         &        0.09         &        0.01         &        0.06         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.05\), \sym{**} \(p<0.01\), \sym{***} \(p<0.001\)}\\
\end{tabular}
}
